Progressive addition lens

Details Progressive addition lens Progressive addition lens

1982-04-08

1984-01-17

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

G02C 706

Patent

active

044261390

ABSTRACT:
A progressive addition lens is provided having a wide transition corridor and an improved balance between astigmatism and distortion in the field of peripheral vision to provide a wide, distortion-free clear view. This is achieved by employing a cosine function in blending the transition corridor with the peripheral area.

REFERENCES:
patent: 4362368 (1982-12-01), van Ligten

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